Commons configuration 2.9.0 not compatible with Java 8

The jar available from https://commons.apache.org/proper/commons-configuration/download_configuration.cgi is not compatible with Java 8.

It seems to have been build with Java 11 and the - release 8 option.

And therefor I run into the problem described here: https://www.baeldung.com/java-compiler-release-option

org/apache/commons/configuration2/io/FileUtils.class contains the following byte code:

112: invokevirtual #21                 // Method java/nio/ByteBuffer.flip:()Ljava/nio/ByteBuffer;